Link for chain grate stokers



June 30, 1931. 1 -E, TRAlNER l1,812,125

LINK FOR CHAIN GRATE sToKERs Filed NOV. 14. 1922 INVENTOR. n

A TTORNEYS.

i 25:' Referring now, to ,the4 drawings,

Patentedlune 30, 1931 `.iinilrzs EDWARD or Benmmoir,

wincozc' CQMPANLQEBAYQNNE, NEW :Ensim Ajcomaom'rron or NEW'y JERSEY l oH'Io, Assienon To. 'THE' -iABcoci 'a f fron'cnam G'M'riasroxnns M y V invention y-Inore particularly relates to a link which may chain grate',

A 'My `invention-will 'be `understood by 5 reference to the"accompanying'drawings,inv

,whichI have illustrated the preferred :form of lny invention",l andinwhich Figure 1 is a fragmentary plan view offasection of a: chaingrate Stoker illustrating `links Vformed in ac- 10 cordance -withy my invention in positionl on the Vtransverse rods Fig. 2,V is a side viewv of a link formed in 'the 'chain-f Fig. 3- is va .plan view; Fig.4 is a bottom plan view Ffig. 5 is an end View taken frorfnthe left vof 2; 1154 FigL G'is an' endv Aviewer/takenV .fromk the right of'Fig. .2; Fig; 7 isalongitudinal sectionofj a portion of .thelink'taken parallel tothe lside thereof;y Fig; 8 lis a section' taken`v on v the vplane I of thev line 8-8gof Fig. 7'V looking'y f 20 'in the directionj of thefarrows ;7

fside viewof the locking pinfandg Fig. 10is a plan view thereof. Y: Y

Like: reference charactersr indicate like `parts throughout the drawings'.

11i's the jisurface vportion fof .the linkand 12the `web thereof, which s madenarrower than the sur-- 4face portion@` The link: made in accordance -with my-invention is preferablyiformed wlith *l aoja slot13, and preferably'extending longitudi-v ofithe link, andinfwhich achain; rod y lnallyI Y, Y

14 is adapted -to be received', the slotf-'b'eing providedwithian openfmouth 513a yexten/ding to thebottomf of the linkiv .The link is also and which has anopen'mouth l15a attheiend of fthe link, the endsfjof 4the slots13'fzandi15,

i .f respectively,` being yspacedzthe .same distance v`sides wgithralsed `portionsfl, whichextend around theends of the. slots and ,beneaththe -same for the purpose ofstrengthening the ,Figs.2,i5andi6.* ,Y .d Y

iiThejllink formed fin accordance within-1y readily replace va--link 'of a i. n to theupper'wall vof the slot 13,"the lower i portiono preferably provfided'with aA second slot-15,@ lwh'ich'falso `extends"longitudinally of theflink, Y ,u l i n p of thelslots. The ypin 19 is theninserted'in`v` 17,6h0'e11d ofthe pinv engaging l the'recess 18, and the'outer'end'of the pinis -Y gspreadbyjineans of'asu'itable tool intot-he:.3902` "opening 21, sol that .ther-pin' locksas the center lines Voftwloeadj acentclfain rods.; .The link is. preferablyprovided ongeachlfbf V vposltion on the'chain provided 'an Y,

` ing'withwthe contracted portion 17??y of the opening. .'A pin 19 is adapted to be'receivedj in the, opening the lower portion of they pin being contracted, as-at 19a, tofitpthe con` tracted portionl'a'of the opening, andthe lower end of the' pin beingreceived,in the recess`-1 8.y Theopeningis so placed that the tpin, when the linkfis in position on the-chain n rods, will comebehind the rod, as illustrated Yin F' 7. 1- The'top of the; pin 19.," which is preferably yformedof Inetal, isjsplit, as at '20, the splitportioncoming,opposite atrans` Y.

V'verse openlng 21 in thech'ainlink.`- Obvious Y :ly the mouth .of the slot in which the chain Y rod 1 4 "is received, as'illustrated in 7,.,

maybe completely closed by the crosspln 19 Vor may be.l only .partially jclosed, as either l arrangement would prevent, ,slipping off` from the: chain rods.

is` broken -open at itsend, the link formed in the ktwo slots engaging" y inserted ysothat the direction of move-f` ment'of the chainV rod is toward the end walls rods. i. i. Y AV common causeof breakage off links is that in somecasesone ofthe common links'is fr .95 `.known `to those skilledin the arty thatthe cornpelled toypullother lin`ks.;,A It is well,

ordinary chain grate stokerfcornprises transversely extendingspaced chainfrods` which Y are connected by driving links for the chain,

the @hein grate also being provided with .the f link from vlkIn accordancewith'my invention, a broken.. ylink maybe replacedywhile the chain is fin ,'movelnent by cutting outvthebroken'vlink `with a'suitabletool, and then when` the chain 80k accordance with my invention l,mayf vbe dropped in position, two adjacent ,chainv rods, the link,

not) 'i i are called common links, that is, the other links that make up the chain grate and are located between the driving links. Vilhen the chain grate is functioning properly, the chain rods, ot course, are driven by the driving links and the chain rods dra along the common links, etch connnon link being called upon to pull only its own weight. ln the case, however, of a. link having a distance between the openings in the link which is less than ft pulls together the two adjacent chain rods which are engaged thereby and when this oecurs, then that chain link is called upon not only to drag along its own weight, but the weight of certain adjacent links transversely yof the chain. For example, it, when the chain is made up, one of the links has a` centento-center distance which is less than standard, tlien that link pulls'together the two chain rods engaged thereby, and thereby causing the under-standard link to drag both its own weight and the weight ot certa-in adjacent links as above iz'idicated. T his is likely to result in the breakage ot the link. Again, is well understood, the openings in the links in which the chain rods are received become enlarged because of wear, thereby spacing somewhat more widely the chain rods, and the usual chain grate has means 'for comper-.sating` for such wear. New, il2 in such a worn chain a new link is inserted with a eentcr-toecenter distance the same'as the links originally in the chain, then the new link will likeu'ise pu l together the engaged chain rods, thereby putting extra strain upon that link because it is compelled to drag along adjacent links and this again is very likely to result in breakage of that link.

Links formed in accordance with my invention and in the manner clearly illustrated in the drawings, overcome the' foregoing ditliculties. By 'forming the link with an openwmouthed slot (l5) having a horizontally extending portion and which engages the chain rod on its upper and lower sides, the foregoing ditliculties are avoided because that end of the link is tree to move longitudinally over the chain rod engaged' thereby. At the same time, by forming the link with an open-mouthed slot having a portion extending longitudinally thereof, the longitudinal .portion of the slot being greater tl an one-halii the width thereof, in Votherwords, greater than one-halt the diameter of' the chain rod, it `will be apparent that the end oi the link having thb open-mouthed slot, nierely rests upon its chain rod when passing along the upper or lower run et the chain, and when closing member such as the pin used for the open-mouthed slot, the pin is merely called upon to prevent excessive longitudinal movement of the link to prevent its falling from the chain.

standard, then that link necessarily Vhat I claim and desire to secure by Letters Patent of the United States is l. In a chain grate stoker, a link having a transverse open-mouthed slot extending longitudinally of the link and adapted to receive a Stoker chain rod, said link having an opening extending from the fuel supporting edge of the link to said slot, and a metallic pin in said opening and extending across the slot for lockino the link in position on the chain rod, said Link having a transverse opening opposite the .end of said pin, and the top of the pin extending laterally into said transverse opening to hold the pin in position.

2. A link for a chain grate having chain rods, said link being provided with tw'o openinouthed slots each adapted to receive a chain rod and a portion of each being enclosed above and below, when the link is positioned in the upper run of the chain, by walls ex.- tending substantially parallel to the top tace of Vthe link, the upper and lower walls ,of said slots supporting said link on the chain rods, said slots being open at the same ends as regards the direction of movement, and means carried by said link and extending across the mouth of one yof said slots toylock the link in position on the associated chain rods.

3. A link for a chain grate having chain rods, said link being provided with two open-mouthed slots each adapted to receive a chain rod and a portion of each being enclosed above and below, when the link is positioned in the upper run of the chain, by walls extending substantially parallel -to the top face of the link, the upper and lower walls of said slots'supporting said link on the chain rods, said slots being open at the same .ends

as regards the direction of movement, said* link being provided with registering openings in the walls above and below one of said slots', and a pin adapted to be'received in said openings, said openings being so plositioned that the associated chain rod is locked inl position in its slot between said pin and the end wall of the associa-ted slot.

, 4. A link for a chain grate stoker provided with a first and a second open-mouthed slot each of which extends substantially parallel to the top of said link when the link is located in position in the top run of the chain and eachy adapted to receive a chain rod, the walls surrounding the slots being corr structed and arranged to support the associated end ofthe link on said rod, and a pin extending into saidsecond slot in front of the chain rod for retaining the link in position on said rod.

5. In a link for a chain grate stokerprovided with a first and asecond open-mouthed slot each of which extends substantially parallel to the top of s aid link when the link is located in position in the top run ot the chain and each adapted to receive a chain said opening and extending into said secondv lslot in front'of the associated chain rod, and 1o rod, the walls surronnding the slots being coni y' 'i 'structed and arranged to support thel associated end of the link on saidA rod, said link being provided with an opening extending' from the surfaceA of said top of saidlink to a position in saidrsecond slotin front of the associated chain rod, and a pin located in means for securingv said pin in position in its opening. e y

6. yIn an endless chain grate', links each having two open ended slots-therein receiving lthe cross rods of the grate, one of said slots being arranged at anV angle to the perndicular to ythe longitudinal axis of the *i link, each linkhaving, an opening extending from a point accessible from the exterior at a turn of the grate to a point inthe other slot e between its open end and' the cross rod there- .y in, and a pin in said opening extending intoy the last mentioned slot.4 Y

7'. In an endless chain grate, having two open ended slotstherein receiving the cross rods of the grate, one of said slotsbeing arranged` at an angle to the perpendicular to the longitudinal vaxis of the i i link, each link having an opening extending from a .point accessible from the exterior at a turn of the grate to a point in the other slot between its open end and the cross rodtherej l in, a pinin said opening extending into the last mentioned slot, and-means said pin in position.

a for securing JAMES EDWARD TRAINEE.

unl

llinks each i 

